The diagram describes how the temperature of the Earth is influenced by the greenhouse.
In general, there are three main stages showing the global warming process, beginning with the sun’s heat radiation and ending with the human activities contributing to the increasing Earth’s temperature.
At the first stage, the Sun distributes 100% of its heat into space, including 6% and 20% scattered from the atmosphere and reflected by clouds respectively while only 1% absorbed by atmosphere and clouds. Moreover, the Earth gains 51% of heat radiation making it warmer. In the second stage, after absorbing, the heat is lost at night. However, the heat is trapped and reflected by the greenhouse gases in the atmosphere, making it suitable for life on the Earth.
At the final stage, because of human activities such as factories’ emission, agriculture and the others cause pollution contributing to the increase of greenhouse gases. With the huge greenhouse gas trap and reflected heat, the Earth becomes extremely warm, then leading to global warming and other natural phenomena.